问题 问答题 简答题

油浸式变压器缺油运行有何后果?

答案

参考答案:

(1)无法对油位进行监视;

(2)增大油和空气接触面,使油氧化、受潮、降低油绝缘性能;

(3)影响绕组对地间的绝缘强度,易造成绝缘击穿;

(4)使油循环不正常、温升高,绝缘易老化。

阅读理解

The first English week at our school started on May 4th, 2009. The whole school was filled with an English learning atmosphere. A series of activities was held. There were handwriting activities, story writing, English songs, role playing in English, and so on, all the teachers and students were very happy. They spoke English, sang English songs and enjoyed all the activities.

Handwriting was for the students in lower grades. Although most of them couldn’t write so well, they were all very careful about it. In the show window, there were a lot of colorful handwritten papers. They copied some articles from books or newspapers. And then they decorated them with pictures in different colors, and some even put their own photos on them. How cute and lovely they looked!

Story writing was for students in Grade 7 and Grade 8. These students are always fond of cartoons, so they got interested in this activity. Reading the stories they made up, all the visitors couldn’t help speaking highly of them.

The most important event was the English show on the last day. The students and teachers presented a lot of English songs and English operas. Each program won storms of applause

One week is not very long, but all the students and teachers learned a lot. Just as the headmaster said, “It is a helpful week. It will certainly lead us to enjoy and learn more from our English studies.”

小题1:In this passage, the English week is described as__________.

A.surprising

B.boring

C.enjoyable

D.serious小题2:Which of the following is Not true?

A.All the students took part in the handwriting contest.

B.The story writing contest was for students in Grade 7 and Grade 8.

C.The English show was the most important event.

D.Teachers also took part in the English week.小题3:What does the underlined word “applause” probably mean?

A.Noise

B.Cheer

C.Sound

D.Music小题4:What does the writer probably want to tell us at the end of the passage?

A.The activities are a good way to learn English.

B.Students usually don’t like English.

C.The activities last longer.

D.Learning English in the classroom is invaluable.

判断题